<template>
    <div>
        <!-- 面包屑导航区域 -->
  <el-breadcrumb separator-class="el-icon-arrow-right">
   <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
   <el-breadcrumb-item>数据统计</el-breadcrumb-item>
   <el-breadcrumb-item>数据报表</el-breadcrumb-item>
 </el-breadcrumb>
  <!-- 卡片视图区 -->
 <el-card>
  <!-- 2.为 ECharts 准备一个定义了宽高的 DOM -->
  <div id="main" style="width: 750px;height:400px;"></div>
 </el-card>    
    </div>    
</template>
<script>
// 1.导入echarts
import * as echarts from 'echarts'
import _ from 'lodash'

export default {
   data(){
       return{
           // 需要合并的数据
          options: {
        title: {
          text: '用户来源'
        },
        tooltip: {
          trigger: 'axis',
          axisPointer: {
            type: 'cross',
            label: {
              backgroundColor: '#E9EEF3'
            }
          }
        },
        grid: {
          left: '3%',
          right: '4%',
          bottom: '3%',
          containLabel: true
        },
        xAxis: [
          {
            boundaryGap: false
          }
        ],
        yAxis: [
          {
            type: 'value'
          }
        ]
      }
       }
   },
   created() {},
   //此时页面上的元素已经被渲染完毕了
   async mounted(){
       // 3.基于准备好的dom，初始化echarts实例
      var myChart = echarts.init(document.getElementById('main'));

    const { data: res } = await this.$http.get('reports/type/1')
    if(res.meta.status !== 200) {
        return this.$message.console.error('获取折线图数据失败！');
    }
      // 4.准备数据和配置项
      // 指定图表的配置项和数据
    const result = _.merge(res.data,this.options)
      // 5.展示数据
      myChart.setOption(result)
   },
   methods:{

   }
}
</script>

<style lang="less" scoped>

</style>
